﻿//====================================================================================================================
//Copyright (c) 2011 IdeaBlade
//====================================================================================================================
//Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated 
//documentation files (the "Software"), to deal in the Software without restriction, including without limitation 
//the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, 
//and to permit persons to whom the Software is furnished to do so, subject to the following conditions:
//====================================================================================================================
//The above copyright notice and this permission notice shall be included in all copies or substantial portions of 
//the Software.
//====================================================================================================================
//THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE 
//WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS 
//OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR 
//OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. 
//====================================================================================================================

using System;
using System.ComponentModel.Composition;
using System.Windows;
using System.Windows.Resources;
using IdeaBlade.EntityModel;

namespace HelloWorld
{
    public interface ISampleDataLoader
    {
        EntityCacheState SampleData { get; }
    }

    [Export(typeof(ISampleDataLoader))]
    public class SampleDataLoader : ISampleDataLoader
    {
        private EntityCacheState _sampleData;

        #region ISampleDataLoader Members

        public EntityCacheState SampleData
        {
            get { return _sampleData ?? (_sampleData = GetSampleData()); }
        }

        #endregion

        private EntityCacheState GetSampleData()
        {
            const string filename =
                @"/DomainModel.SL;component/SampleData.xml";

            StreamResourceInfo res = Application.GetResourceStream(new Uri(filename, UriKind.Relative));

            if (null == res)
                throw new InvalidOperationException(
                    "Couldn't find design ECS at " + filename);

            return EntityCacheState.Restore(res.Stream, useBinaryFormat: false);
        }
    }
}